ph_arp.cc

/*
 * Copyright (c) 2001 - 2003
 *      Sebastian Majewski. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Sebastian Majewski
 *      and his contributors.
 * 4. Neither the name of Sebastian Majewski nor the names of his contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */


#include <netz.h>

#include "ether_type.h"
#include "hr_type.h"
#include "ph_packet.h"
#include "support.h"



c_string print_arp_operation(word);


c_string arp_packet_handler(c_packet_info packet_info)
{
    c_string output_string;

    c_arp_header header(packet_info.packet);

    output_string.add((char*)"ARP  \t");

    output_string.add_hex((char*)"HRTYPE 0x%02X%02X (",
        header.get_hrtype());

    output_string += print_arp_hrtype(header.get_hrtype());

    output_string.add((char*)")  ");

    output_string.add_hex((char*)"PRTYPE 0x%02X%02X (",
        header.get_prtype());

    output_string += print_ether_type(header.get_prtype());

    output_string.add((char*)")  ");

    output_string.add((char*)"\n\t"); 

    output_string.add((char*)"HRLEN %u  ",
        header.get_hrlen());

    output_string.add((char*)"PRLEN %u  ",
        header.get_prlen());

    output_string.add_hex((char*)"OPER 0x%02X%02X (",
        header.get_operation());
 
    output_string += print_arp_operation(header.get_operation());

    output_string.add((char*)")");

    string addr_string[64];

    output_string.add((char*)"\n\t");

    output_string.add((char*)"SHA ");

    switch(header.get_hrtype())
    {
        case ARP_HRTYPE_ETHER:
        case ARP_HRTYPE_IEEE802:

            string addr_str[32];

            output_string.add((char*)"%s  ",
                conv_ether_str(addr_str, header.get_sha()));

            break;
    
        default:
            output_string.add((char*)"<not supported>  ");
    }


    output_string.add((char*)"SPA ");

    switch(header.get_prtype())
    {
        case ARP_PRTYPE_IP:
            output_string.add((char*)"%s  ",
                conv_ip_str(addr_string, header.get_spa()));
            break;

        case ARP_PRTYPE_IP6:
            output_string.add((char*)"%s  ", conv_ip6_str(addr_string,
                header.get_spa()));
            break;
   
        default:
            output_string.add((char*)"<not supported>");
    }    

    output_string.add((char*)"\n\t");

    output_string.add((char*)"THA ");

    switch(header.get_hrtype())
    {
        case ARP_HRTYPE_ETHER:
        case ARP_HRTYPE_IEEE802:

            string addr_str[32];

            output_string.add((char*)"%s  ",
                conv_ether_str(addr_str, header.get_tha()));

            break;
    
        default:
            output_string.add((char*)"<not supported>  ");
    }	

    output_string.add((char*)"TPA ");

    switch(header.get_prtype())
    {
        case ARP_PRTYPE_IP:
            output_string.add((char*)"%s  ",
                conv_ip_str(addr_string, header.get_tpa()));
            break;

        case ARP_PRTYPE_IP6:
            output_string.add((char*)"%s  ", conv_ip6_str(addr_string,
                header.get_tpa()));
            break;
   
        default:
            output_string.add((char*)"<not supported>");
    }

    output_string.add((char*)"\n");

    output_string += debug(packet_info);

    output_string += print_line();

    return output_string;
}


c_string print_arp_operation(word operation)
{
    switch(operation)
    {
        case ARP_OP_REQUEST:
            return c_string((char*)"Request");

        case ARP_OP_REPLY:
            return c_string((char*)"Reply");

        case ARP_OP_REVREQUEST:
            return c_string((char*)"Reverse Request");

        case ARP_OP_REVREPLY:
            return c_string((char*)"Reverse Reply");

        case ARP_OP_INVREQUEST:
            return c_string((char*)"Inverse Request");

        case ARP_OP_INVREPLY:
            return c_string((char*)"Inverse Reply");

        default:
            return c_string((char*)"Unknown");
    }
}